2021 Mercedes-Benz E63 AMG S

The 2021 Mercedes-Benz E63 AMG S is a high-performance luxury sedan known for its blistering acceleration, sophisticated technology, and opulent interior. It is primarily powered by a handcrafted 4.0-liter twin-turbocharged V8 engine producing 603 horsepower and 627 lb-ft of torque. It is exclusively paired with a 9-speed AMG Speedshift MCT transmission. Owners often praise the car’s powerful engine, agile handling, and luxurious interior, but some have expressed concerns about its firm ride, high price, and potential maintenance costs.

Engine

4.0L Twin-Turbo V8 (M177)

• Turbocharger Failure
  • Description/Symptoms: Whining noise from the engine, reduced power, check engine light. Turbochargers, specifically the wastegate actuator or the turbocharger itself, can fail prematurely.
  • Solution: Replacement of the faulty turbocharger.
  • Estimated Cost to Fix: $3,000 - $6,000+
• Oil Leaks
  • Description/Symptoms: Oil spots under the car, burning oil smell, low oil level warning. Common leak areas include valve cover gaskets, oil pan gasket, and turbocharger oil lines.
  • Solution: Replacing the leaking gasket or line.
  • Estimated Cost to Fix: $200 - $1,500+ depending on the location and severity.
• Spark Plug Issues
  • Description/Symptoms: Rough idling, misfires, check engine light. Spark plugs may foul or degrade prematurely, leading to ignition problems.
  • Solution: Replacing the spark plugs.
  • Estimated Cost to Fix: $300 - $600

Transmission

9-Speed AMG Speedshift MCT (9G-Tronic)

• Rough Shifting/Hesitation
  • Description/Symptoms: Harsh or jerky shifts, especially during low-speed acceleration or deceleration. Hesitation when shifting between gears.
  • Solution: Software update, transmission fluid flush and filter replacement, or valve body replacement.
  • Estimated Cost to Fix: $200 - $3,000+ depending on the issue.
• Transmission Slipping
  • Description/Symptoms: Engine revs high without corresponding acceleration, delayed engagement of gears.
  • Solution: Valve body replacement or full transmission rebuild/replacement.
  • Estimated Cost to Fix: $3,000 - $8,000+

Suspension

• Air Suspension Problems (If Equipped)
  • Description/Symptoms: Car sits unevenly, compressor failure, suspension malfunction warning light. Air struts or air lines can leak, leading to compressor failure.
  • Solution: Replacing the leaking air strut or air line, or replacing the compressor.
  • Estimated Cost to Fix: $1,000 - $3,000+ per strut, $500 - $1,500+ for the compressor.
• Noises
  • Description/Symptoms: Clunking, creaking, or knocking noises from the suspension, especially over bumps.
  • Solution: Replacing worn bushings, ball joints, or control arms.
  • Estimated Cost to Fix: $300 - $1,500+

Electrical

• Infotainment System Issues (MBUX)
  • Description/Symptoms: Freezing, crashing, slow response times, connectivity problems (Bluetooth, Apple CarPlay/Android Auto).
  • Solution: Software updates, resetting the system, or replacing the infotainment unit.
  • Estimated Cost to Fix: $0 (software update) - $2,000+ (replacement).
• Sensor Malfunctions
  • Description/Symptoms: Various warning lights, including ABS, TPMS, parking sensors, or driver-assistance systems. Faulty sensors can cause inaccurate readings or system malfunctions.
  • Solution: Replacing the faulty sensor.
  • Estimated Cost to Fix: $200 - $800+ per sensor.
• Battery Drain
  • Description/Symptoms: Car struggles to start, battery requires frequent charging. Parasitic drain from various electrical components or a faulty battery.
  • Solution: Identifying and addressing the source of the drain, or replacing the battery.
  • Estimated Cost to Fix: $200 - $500+

Exterior

• No Issues Found

Interior

• Creaking/Rattling Noises
  • Description/Symptoms: Unwanted noises emanating from the dashboard, trim panels, or seats. These noises can be exacerbated by temperature changes or road conditions.
  • Solution: Tightening loose fasteners, applying felt tape to contact points, or replacing worn clips.
  • Estimated Cost to Fix: $100 - $500+ (depending on the severity and source of the noise)

Recalls:

• 2021070015: Some vehicles may experience a software issue that could affect the activation of the hazard warning lights in the event of a crash
• 2021100001: Some vehicles may have been assembled with an improperly tightened nut on the rear axle

Summary

The 2021 Mercedes-Benz E63 AMG S, while a performance powerhouse, can exhibit some common issues. Engine and transmission issues, such as turbocharger failure, oil leaks, and rough shifting, can be costly to repair. Electrical gremlins with the infotainment system and sensor malfunctions are also potential concerns. The air suspension (if equipped) can also add to the maintenance burden. While some issues are minor and easily resolved, others can be more severe and expensive. Prospective buyers should be aware of these potential issues and carefully inspect the car’s maintenance history before making a purchase.